Remove Service Policy from Routed Ports

Unanswered Question
Sep 23rd, 2010
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Hello everybody,

I must change the QoS configuration on a router Cisco 871 (IOS: IP services 12.4(24) T1). The service policy is applied to the routed port, fastethernet4.

Can I do the changes from within the policy-map configuration without removing the service policy? Will the effects take place as soon as I press enter?


If I'll have to remove the service policy before doing any change, will this trigger the port to go down because the policy map is actually policing? I was thinking in that case to put an access list inbound on the WAN port to stop all traffic..


Thanks.

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sumitava123 Fri, 09/24/2010 - 01:05
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Hi ,


It depends upon the configuration. Please share the config of the class-map,policy-map and the acl(if any ) .


Sumit

Lei Tian Fri, 09/24/2010 - 04:27
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  • Cisco Employee,

Hi,


Yes,you can modify the policy-map with service-policy attached to interface.


Regards,

Lei Tian

danrya Fri, 09/24/2010 - 10:23
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You can change the policy-map and attached class-maps while it's attached to the interface.


All changes take affect upon pressing enter!


If you delete an ACL or remove the match statement from the Class-map traffic will stop matching and look to the next class-map.


You need to be very careful when doing this and make sure you understand what will happen when you make the change.  For example

Your matching a /32 address and not policing, but then matching a /24 that includes the /32, but policing the subnet to a CIR.  This allows the single /32 to use all bandwidth but the other devices are policed down.


If you remove the ACL for the /32 or remove the class for the /32 it will then match with the /24.  That could cause a loss of traffic on the IP address.


Dan

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